public class Example4_7 {
	public static void main(String args[]) {
		Battery nanfu = new Battery(100);		               
		System.out.println("南孚电池的储电量是:"+nanfu.electricityAmount);			                    
	       	Radio radio = new Radio();						        System.out.println("收音机开始使用南孚电池");					radio.openRadio(nanfu);      
    		System.out.println("目前南孚电池的储电量是:"+nanfu.electricityAmount);								
	}
}


